Simple compiler - from code to ARM assembler

Custom language parser, compiler and code generator written in TypeScript.

Inspired by a great book written by Vladimir Keleshev "Compilling to Assembly".

Usage

Currently all the code is in one file named compiler.ts. That is all code of the compiler, parser and code to compile itself.

Custom language syntax by example

This is a valid code that should compile. Note: putchar is allowed as an external C call.

function pair(x: number, y: number): array<number> {
    return [x, y];
}
function print_string(text: string, length: number): void {
    for(var i = 0; i != length; i = i + 1;) {
        putchar(text[i]);
    }
}
// by default functions return 'number' type
function factorial(n) {
  if (n == 0) {
    return 1;
  } else {
    return n * factorial(n - 1);
  }
}
function main(){
    var arr = pair(65, 66);
    var firstElement = arr[0];

    var text = "to jest test 123";
    var length = 16;
    print_string(text, length);

    if (length != 16) {
        print_string("lt or gt 16", 11);
    } else {
        print_string("eq to 16", 8);
    }

    var factorialOfFive = factorial(5);
}

Installing

Prerequisites

• TypeScript >= v4.0.3
• Node >= v12.18.4

Build steps

1. Clone the repo
2. cd to the root
3. Execute tsc
4. Execute node ./out/compiler.js

If on Mac/Linux use the shortcut script ./run.

You will see generated ARM assembly code in your terminal.

Edit code

The code to be compiled is stored in var source variable at the bottom of the main file compiler.ts. Edit that text and try to compile it.

Disclaimer

This is just a toy compiler project. Don't use it in production environments - it probably won't work!

Thanks for checking out!